Selective Reduction of 5-Nitro-2-Chloro-2',4'-Dimethylbenzene Sulfonanilide on Pd-Ru/?-Al2O3 Catalysts in Ionic Liquids

Yajuan Zhao, Langsong Si, Xuehua Jin and Yulei Tai

Modern Applied Science, 2010, vol. 4, issue 5, 155

Abstract: The use of ionic liquids as reaction medium for hydrogenation of 5-nitro-2-chloro-n- (2',4'-dimethyl)benze-nesulonamid(NCD) to 5-amino-2-chloro-n-(2',4'-dimethyl) benzenesulfonamid (ACD) has enabled us to obtain high selectivity on Pd-Ru/?-Al2O3 catalysts at 338 K under 0.35 MPa of hydrogen pressure. The selectivity for the hydrogenation of ACD in [EPy]Br or [BPy]Br was proved to be close to 100%. Additionally, the ionic liquids and molar ratio of Pd to Ru appeared to have a deepgoing influence on the selectivity of catalysts and at the highest-selectivity point, the molar ratio of Pd to Ru was 1-1 for hydrogenation of NCD in [XPy]Br.

Date: 2010
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